Two of Scotland's top golfers teed off with Donald Trump at the opening of his controversial £1bn golf course in Aberdeenshire today, despite calls for a boycott from conservationists.

The Scottish Wildlife Trust wrote an open letter urging golfers Colin Montgomerie, Paul Lawrie and Martin Laird not to play at the Trump International Golf Links course at Menie Estate on the grounds it was built on "a unique, protected area" with "nationally important landforms and wildlife". Lawrie was unable to attend because of bad weather.

An action group, Tripping Up Trump, has supported local residents opposed to the construction, and a film company called Montrose Pictures produced a documentary following the development. You've Been Trumped was shown in cinemas in Edinburgh, Glasgow and London last weekend to coincide with the course's opening. A trailer for the film places footage of Trump stating "we've had tremendous support from the environmental groups", alongside a spokesperson for the RSPB explaining that "the whole package is wrong".

However, environmental concerns could prevent Trump from completing the final stages of his development. The businessman reportedly considered moving the course to Ireland after hearing about plans to construct an offshore windfarm 2km away from the site.

Speaking on Radio 4's Today programme today, David Milne, a resident on the Menie Estate, questioned Trump's projections for the course, and summed up: "I do not believe this course is environmentally sustainable, and therefore will not be economically sustainable."